class_docstr: tokenizer op test
code: def setUp(self):
      super().setUp()
      self.vocab = [
          "</s>",
          "<unk>",
          "hello",
          "你好",
          "world",
      ]
      self.vocab_filepath = tempfile.mktemp(suffix="vocab.txt")
      with open(
          self.vocab_filepath, mode="w", encoding="utf-8"
      ) as fobj:
          for token in self.vocab:
              fobj.write(token)
              fobj.write("\n")
  
file_path: delta/core/ops/kernels/tokenizer_ops_test.py
imports: import time
  import tempfile
  import delta.compat
  from absl import logging
  from delta.layers.ops import py_x_ops
label_desc: Use image node_id 1 for calling the TokenizerOpsTest obj's underlying member method code with example usage: obj.setUp() without return types